I agree with illiswiller, muskies get way too big for any common size tank, so unless you have an empty 1200 gallon lying around, I'd nix the idea. Personally, I don't even think they'd be happy in a tank that size. Also, they prefer vegatation and submerged logs to hide amongst in the wild.
And oy vey, what about the food bill? It must be staggering. I don't think these guys even bother with feeders after they reach a certain size. When I was younger and into sportfishing, I read accounts of Muskies eating duck hatchlings and baby muskrats. That translates into lots of boneless chicken breast or frozen haddock, neither of which is cheap.